Eucalyptus

Eucalyptus (From Greek, ευκάλυπτος = "Well covered") is a diverse
genus of trees (and a few shrubs), the members of which dominate the
tree flora of Australia. There are more than seven hundred species of
Eucalyptus, mostly native to Australia, with a very small number found
in adjacent parts of New Guinea and Indonesia and one as far north as
the Philippine islands.

Members of the genus can be found in almost every region of the Oceiana
continent, because they have adapted to all of its climatic conditions;
in fact no other continent is so characterised by a single genus of tree
as Australia is by its eucalyptus. Many, but far from all, are known as
gum trees in reference to the habit of many species to exude copious sap from any break in the bark (e.g. Scribbly Gum).